fix(trash)+refactor(file life cycle)

* fix issue with the empty trash (wasn't calling thumbnail clean up)
 * refactor file service life cycle (TrashService don't call directly ThumbnailService, but call the on_file_deleted() hook
 * remove unused mehod: _validate_user_ownership()

src/application/services/mod.rs

@@ -6,6 +6,7 @@ pub mod calendar_service;
 pub mod contact_service;
 pub mod device_auth_service;
 pub mod favorites_service;
+pub mod file_lifecycle_service;
 pub mod file_management_service;
 pub mod file_retrieval_service;
 pub mod file_upload_service;